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Smith et al – Structure from Motion Photogrammetry in Physical Geography

6 hours 51 min ago
In this article, Smith et al discuss a new advancement in the field of topographic data collection: the combined forces of Structure from Motion (SfM) and Multi-View Stereo (MVS) analysis. This system works tangentially as a way to acquire data from still images and then constituting those images into a 3d model using point clouds […]

Thoughts on structure from motion – Smith et al. (2016)

21 October 2017 - 12:42pm
Smith et al. (2016) discuss various dimensions of the structure from motion (SFM) photogrammetry technique, which is a recent development in topographic survey methods in physical geography. This article is one of the first times that our class has touched on a dimension of GISciences which is tightly linked to a physical system. As such, […]

On Johnson et al (2017)

20 October 2017 - 7:20pm
I thought this article was really interesting, as I didn’t know too much about UAVs and their uses (and access to their imagery). The article covered the uses of (and constraints) of imagery from UAVs, and offered a refined list of online or free sources of imagery and editing software to process these images or […]

Volunteered Drone Imagery, Johnson et al. (2017)

20 October 2017 - 6:51pm
I think the article draws an interesting comparison between volunteered drone imagery (VDI) and other forms of volunteered geographic information (VGI). The “rise of the amateur” in most other VGI applications was really enabled by the spread of personal computers. It’s difficult for me to envision a world, at least in the near future, where […]

Thoughts on ‘Volunteered Drone Imagery…” (Johnon et al.)

20 October 2017 - 5:20pm
I thought this paper was short and sweet summary of the current state of UAV/UAS acquisition tools and data processing softwares. They used OSM as a a parallel, vector-based example of what the future platform could be for aerial data and it was helpful to have some schema about this topic to build from. One […]

Volunteered Drone Imagery (Johnson et al. 2017)

20 October 2017 - 2:25pm
I found this article very interesting, especially in the context of my project topic for this course, VGI. This goes a step beyond OSM and other vector-based VGI platforms, and attempts to use raster and all the issues that lie within it. With varying scale, resolution, flight height, and the other plethora of drone attributes […]

Johnson et al (2017) – AUVs for VGI

19 October 2017 - 1:42am
This paper offered an interesting introduction to unmanned aerial vehicles (UAVs), following the process from data acquisition to map distribution. Johnson et al advocate for the development of an Open Street Map-style data repository, where users can volunteer imagery that they’ve collected themselves. This type of platform, they argue, could provide an invaluable resource for […]

Thoughts on Radil et al.

16 October 2017 - 11:05am
After reading “Spatializing Social Networks: Using Social Network Analysis to Investigate Geographies of Gang Rivalry, Territoriality, and Violence in Los Angeles”, I am more able to understand the methodologies of quantitatively relating physical geography and social networks. The use of reported violence as the indicator for relatedness is interesting, especially in the field of social […]

Spatializing Social Networks (Radil et al. 2010)

15 October 2017 - 11:58pm
I really enjoyed this paper and how it clearly elucidated the theories of social network analysis, the idea of embededness and interplay between spatial and social attributes of geographical phenomena, and the need for a matrix-based model to describe and predict gang-based violence in Los Angeles. The overarching and unspoken goal of the paper seemed […]

Integrating Social Network Data into GISystem (Andris, 2016)

15 October 2017 - 11:19pm
Through this paper, Andris reminds us that there is a huge gap between social networks (SNs) and GISystem (GIS). NS analysis always happens without many geographic considerations.   As Andris indicates, SN analysts rarely care about geographic features except for distance. However, most geographers may agree that distance is not enough to represent the geography […]

Wang & al.: CyberGIS software

15 October 2017 - 11:17pm
The article by Wang &al highlights the uses go cyberinfrastructure  in the domain of GIS. The emerging field has the potential to create systems to more effectively handle the large and increasing amounts of geospatial data. Thanks to the nature of cyberinfrastructure, geoinformation could be processed almost immediately which could provide an immediate result to […]

Radil: Gang Violence & Social Networks

15 October 2017 - 10:30pm
The article by Radil and Al on gang violence in Los Angeles uses a social network approach to understand the patterns of violent crimes and territoriality in the the Hollenbeck area. it considers how rivalries between gangs (social connections) are perpetuated and what boundaries might separate them. The article uses information from the LAPD and […]

On Wang et al. (2013)’s discussion of CyberGIS software

15 October 2017 - 5:48pm
I found that this article was incredibly dense and difficult to get through, as other classmates have noted. Wang et al. discuss various cyber softwares and their limitations, but with focuses on the CI and programming aspects of it, which I know little about.  In their concluding thoughts, Wang et al. outline the NSF-funded ESRI/USGS/et […]

On Andris (2016), social networks, and geovisualization

15 October 2017 - 4:57pm
I found this article super interesting, as it discussed the complexities of visualizing social ties over space. I had never thought about 1) the fact that most relationships are thought about at least a little bit geographically but geographic visualization systems have not been able to visualize these dynamics (because they are, as Andris notes, […]

Radil, Flint and Tita (2010): Spatializing Social Networks: Using Social Network Analysis to Investigate Geographies of Gang Rivalry, Territoriality, and Violence in Los Angeles

15 October 2017 - 1:17pm
This article by Radil, Flint and Tita (2010), examines the geographies of gang violence, territoriality and rivalry in Hollenbeck, Los Angeles, by spatializing social networks. One thing that I found engaging in the article is the notion of embeddedness, and in particular the spatiality of embeddedness. Embeddedness was not something I ever considered in GIS […]

On Wang and Armstrong (2009)

15 October 2017 - 8:03am
It is easy to be critical of Wang and Armstrong (2009) as someone with no background knowledge of cyberinfrastructures (CIs). Before getting into a discussion of the actual content of this paper, I must comment (as others on this blog have done before me) on the authors’ gratuitous use of jargon and unclear writing. This […]

A theoretical approach for using cyberinfrastructure (Wang & Armstrong, 2009)

15 October 2017 - 1:43am
In this paper, Wang and Armstrong (2009) propose a theoretical framework for solving the problems, which are about logic, generality, compatibility, in the GIScience practices of spatial domain decomposition and task scheduling. There are some correlations between these problems. Wang and Armstrong firstly argue that we should move the focus from spatial data and its […]

Social Network Analysis of Gang Rivalry, Territoriality, and Violence, Radil et al. (2010)

14 October 2017 - 10:26pm
Ridal et al. (2010) synthesize sociological and geographic techniques to investigate gang related activity in an eastern policing district of Los Angeles, California. The article challenged my conception of space and its role in GIScience. I can appreciate how social networks can be “spatialized” in relation to geographic information, but it was interesting how the […]

Andris 2016 – Social networks in GIS

14 October 2017 - 2:15pm
As outlined in the CyberGIS articles, rapidly increasing quantities of geo-/ socially-referenced information is being generated. Andris (2016) argues that the existing theoretical and technical infrastructures of Social Networks (SN) and GISystems are insufficiently integrated for efficient geosocial analysis. The author proposes a stronger embedding of SN systems in geographic space. In their framework, a node […]

CyberGIS Software: a synthetic review and integration roadmap

14 October 2017 - 2:03pm
CyberGIS is a combination of SAM (Spatial analysis and modelling), GIS and cyber infrastructure. Why the need for this new term? It seems that it is assessing the issue of the sheer quantities of data being produced at each passing instant, traditional forms of GIS are no longer able to adequately handle and visualize all […]